255 citations · 908 across the 15 of their papers we have counts for
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Quantum gates and multi-particle entanglement by Rydberg excitation blockade and adiabatic passage
Ditte Moller, Lars Bojer Madsen, Klaus Molmer
We propose to apply stimulated adiabatic passage to transfer atoms from their ground state into Rydberg excited states. Atoms a few micrometers apart experience a dipole-dipole int…
Geometric phases in open tripod systems
Ditte Moller, Lars Bojer Madsen, Klaus Molmer
We first consider stimulated Raman adibatic passages (STIRAP) in a closed four-level tripod system. In this case, the adiabatic eigenstates of the system acquire real geometric pha…
Geometric phase gates based on stimulated Raman adiabatic passage in tripod systems
Ditte Moller, Lars Bojer Madsen, Klaus Molmer
We consider stimulated Raman adiabatic passage (STIRAP) processes in tripod systems and show how to generate purely geometric phase changes of the quantum states involved. The geom…
Entanglement between remote continuous variable quantum systems: effects of transmission loss
Lars Bojer Madsen, Klaus Molmer
We study the effects of losses on the entanglement created between two separate atomic gases by optical probing and homodyne detection of the transmitted light. The system is well-…
Fidelities for transformations of unknown quantum states
Lars Bojer Madsen, Klaus Molmer
We present a general theoretical formalism to compute the fidelity of transformations of unknown quantum states. We then focus on the case of Gaussian transformations of continuous…
Continuous measurements on continuous variable quantum systems: The Gaussian description
L. B. Madsen, K. Mølmer
The Gaussian state description of continuous variables is adapted to describe the quantum interaction between macroscopic atomic samples and continuous-wave light beams. The formal…